ICD-10 Code I68.2 – Cerebral arteritis in other diseases classified elsewhere (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I68.2 – Cerebral arteritis in other diseases classified elsewhere
What it is
I68.2 identifies inflammation of the brain’s arteries when it is caused by another underlying disease. You use it to show the cerebral arteritis is a manifestation of a separate condition, not a primary diagnosis.
Clinical signs
Clinical features vary; refer to documentation. Findings may include neurologic deficits or evidence of cerebral vessel inflammation, but the record should clearly link the arteritis to the underlying disease.
When to use this code
Use I68.2 when the provider documents cerebral arteritis secondary to another classified disease and the causal condition is identified. Code the underlying disease first, then assign this code as a manifestation when documentation supports that relationship.
If the note only mentions suspected vasculitis, cerebral ischemia, or nonspecific neurologic symptoms, check documentation before coding I68.2. You need clear support that the arteritis is cerebral and secondary to another condition.
Do not use for
Do not use this code for primary cerebral arteritis or for vasculitis without a documented underlying disease. Check documentation if the record does not specify a causal condition.
Coding tip
Always sequence the underlying disease first and verify the provider’s wording ties the cerebral arteritis to that condition.